Rocker noise

[rditz]

I have finally started my motor, a 302 built for me. It sounds really good, but I have got a significant tapping noise on both rocker banks.

It has a Comp Cams Cam, Comp Hydraulic Lifters, Manley Pushrods, Comp Roller Rockers, Manley Valves.

I have adjusted the rockers as described by the Rockers instructions but the noise is still significant. I called Comp Cams on the weekend and the fellow said I might have to preload the rockers as much as another 1/4 turn.

I am nervous about turning too much more and bending a valve.

Has anyone done this before and is there some "trick" to getting this noise to go away??

BTW, there is lots of oil pressure...

thanks in advance.

rod

[lavron]

Did you prime the engine before you started it? (spin the oil pump)

Does the noise continue even after it has run awhile?

If it is tapping significantly I don't the 1/4 turn will hurt any

See Ya,
Mike

[rditz]

Mike,

yes the engine was primed and had run for a while.. the engine was built by a speed shop so I will be checking in with them as well..

I also had called Comp Cams (you know they are on duty even on Saturdays??) and they said that I might have to go as much as 3/4 turns from 0 lash.

I am going to get back to it tonight, hopefully, and if that is all it is, then we should be OK.

Thanks

Rod

[rditz]

Well, noise problem solved.... and do I ever feel dumb...

Turns out that the valve covers that I bought are just short enough to be causing the knocking..i replaced them with the original 302 aluminum covers that are slightly taller and poof, noise is gone...

I guess that the comp roller rockers combined with the cam and pushrods need that little extra swing room...

It is a shame, because the valve covers looked really cool and matched the air cleaner...

Anyone know if running a double valve cover gasket would work as a way to lift the valve covers that little bit needed??? does anyone have any thoughts on the longevity of doing so??

Thanks

rod